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Service Manual
Ne
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lectronic Cold Platform 2005
Edition
2005.03.25
Language
E
nglish
Functional description of the refrigerant circuit:
Cold is generated inside the appliance by means of constant variations of pressure and volume of a con-
stant mass of refrigerant fluid.
The refrigerant is compressed in the compressor, and due to the effect of the work expended by the com-
pressor motor, it is brought to the state of superheated vapour. Before entering the condenser, the refriger-
ant passes through a hot anti-condensation tube.
I
n the condenser the refrigerant releases heat to the exterior environment and then, by flowing through the
capillary tube, the refrigerant is subjected to a sudden pressure drip that enables it to evaporate at low
temperature. The fluid evaporates inside the refrigerator and freezer evaporators.
During these phase changes the fluid absorbs heat from the surrounding environment thereby causing the
refrigerator and freezer compartments to be chilled down to the required temperature values, which are
regulated by means of suitable thermostat control.
Function of the solenoid valve:
The solenoid valve is controlled in such a way as to
route the cold refrigerant to the refrigerator or freezer
compartment depending on the user settings of the
temperature adjustment knobs, thereby allowing full
independence of cooling demands from the two com-
partments. When the cooling demand is transmitted
from the freezer compartment the thermodynamic
circuit is closed by the solenoid valve thereby inten-
sifying cooling capacity in the freezer compartment.
When the cooling demand comes from the refrig-
erator compartment the thermodynamic circuit
causes the fluid to evaporate first in the refrigerator
evaporator and then to cool also the freezer com-
partment.
1
Compressor
2
Condenser
3
Heating Tube (LIGHT BLUE)
4
Return Tube (GREEN)
5
Fridge Capillary Tube (RED)
6
Freezer Capillary Tube (YELLOW)
7
Freezer Evaporator (RED)
8
Fridge Evaporator (RED)
9
Solenoid valve
10
Accumulated Gas Canister
11
Molecular filter
EVAPORATOR COMPONENTS
Low Pressure
RED Fridge - Freezer circuit
YELLOW Freezer Circuit
GREEN Return Tube
COMMON COMPONENTS
High Pressure
LIGHT BLUE Heating Tube
Summary of Contents for New electronic cold platform 2005
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